Grammarly vs Relay: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of Grammarly and Relay — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
Grammarly
Grammarly, Inc.
Writing assistant that provides real-time grammar, clarity, tone, and text generation guidance across apps and websites.
Key features
- Real-Time Grammar and Spelling: Continuously analyzes text as you write in browsers, desktop apps, and Microsoft Word/Office to surface grammar, punctuation, and spelling corrections with explanations.
- Style, Clarity, and Tone Suggestions: Offers context-aware rewrites and suggestions to improve clarity, conciseness, tone, and formality based on user-selected goals (audience, tone, intent).
- Text Generation and Rewrites: Generates alternative phrasing, sentence rewrites, and expansions to help craft emails, reports, or creative content directly from the editor.
- Cross-Platform Integrations: Browser extensions, desktop apps, Microsoft Office add-ins, and mobile keyboards allow consistent feedback across web apps, documents, and messaging platforms.
- Vocabulary and Fluency Enhancements: Recommends stronger word choices, idiomatic phrasing, and fluency improvements to elevate writing quality (Premium feature).
- Plagiarism Detection and Citation: Scans text against billions of web pages and academic databases to detect potential plagiarism and help manage citations (Premium/Business feature).
- Custom Style Guides and Team Management: Business plans enable centralized style guides, brand tone settings, and administration tools for consistent team-wide writing standards.
- Personalized Insights and Performance Reports: Provides weekly writing insights, performance metrics, and suggestions to help users track improvement over time.
- Real-time grammar and spelling correction and suggestions
- Style, tone, and clarity recommendations with adjustable writing goals
- Text generation and rephrasing capabilities
- Plagiarism detection (available in paid tiers)
- Microsoft Word add-in (integration into Office ribbon) and desktop integrations
- Browser extensions to enable checks on any website or web app
- Personalized suggestions based on user-selected goals (audience, formality, tone)
- Research and open-source tooling for grammatical error correction (GitHub projects such as GECToR)
- Team and business features for centralized management and analytics (Business plans)
Best for
- Professional Email Drafting: Compose and polish client or internal emails with suggestions for tone, formality, and concise phrasing to improve clarity and professionalism.
- Academic Writing and Plagiarism Checking: Students and researchers refine essays, theses, and papers while using plagiarism detection to ensure originality and proper citation (Premium).
- Content Marketing and Copy Editing: Marketers and content creators optimize headlines, calls-to-action, and long-form articles for clarity, engagement, and brand voice consistency.
- Business Team Style Alignment: Companies enforce a shared style guide and team settings to keep documentation, proposals, and customer communications on-brand and consistent.
- Non-native English Support: Language learners receive grammar explanations, fluency improvements, and tone adjustments to produce more natural English writing.
- Real-time Social and Messaging Improvement: Improve posts, comments, and chat messages across web apps using the browser extension or desktop integrations for error-free public-facing content.
- Document Collaboration and Review: Editors and collaborators use Grammarly's suggestions and commentary to accelerate proofreading and reduce manual editing cycles.
- Proofreading emails, essays, and reports to eliminate grammar and spelling mistakes
- Improving style, tone, and clarity for professional or academic writing
- Generating or rephrasing sentences and paragraphs during content creation
- Ensuring originality with plagiarism checks for submitted documents
R
Relay
Relay
AI phone receptionist that builds itself from a business's website to answer every call and book, reschedule, or cancel appointments 24/7.
Key features
- One-Click Build: Paste a website and Relay drafts the agent profile, knowledge base, prompt, and call wiring in about 38 seconds.
- 24/7 Call Answering: Picks up every call day or night in the caller's local time, with no voicemail or hold music.
- Real Calendar Booking: Checks live availability and writes appointments, reschedules, and cancellations directly to the business's existing booking system.
- Booking Integrations: Connects to 7+ systems including Google Calendar, Square, Calendly, Outlook, Housecall Pro, Workiz, and Vagaro with one sign-in.
- Grounded Answers: Answers caller questions from the business's own facts and knowledge base rather than guessing.
- No-Config Setup: Requires no dashboards, prompt engineering, or manual call-flow building.
Best for
- Missed-Call Recovery: Capture bookings from calls that would otherwise ring out when staff are busy or closed.
- Appointment-Based Businesses: Let salons, clinics, and home-service providers automate booking, rescheduling, and cancellations by phone.